41-1

SH-AWD DTC Troubleshooting: 41-1

DTC 41-1: F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))

NOTE: Before you troubleshoot, review the general troubleshooting information. Initial Inspection and Diagnostic Overview

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS.

3. Start the engine.

4. Check for DTCs in the PGM-FI system with the HDS.

Are there any PGM-FI system DTCs indicated?
YES - Go to the indicated DTC's troubleshooting.

NO - Go to step 5.


5. Check for DTCs with the HDS.

Is DTC 41-1 indicated?
YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time. Check for intermittent open between SH-AWD control unit connector terminals A10 and A20 and PCM connector terminals A48 and A49.


6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Jump the SCS line with the HDS.
NOTE: This step must be done to prevent PCM damage.

8. Disconnect PCM connector A (49P).

9. Disconnect SH-AWD control unit connector A (20P).

10. Check for continuity between PCM connector terminals A48, A49 and SH-AWD control unit connector terminals A10, A20 individually.

Is there continuity?
YES - Update the SH-AWD control unit if it does not have the latest software, SH-AWD Control Unit Update or substitute a known-good SH-AWD control unit, Service and Repair and recheck. If the symptom/indication goes away with the updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit, replace the original SH-AWD control unit. Service and Repair

NO - Repair open in the wires between the SH-AWD control unit and the PCM.